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公开(公告)号：US11185840B2
公开(公告)日：2021-11-30
申请号：US16314514
申请日：2018-10-11
申请人： Kureha Corporation
摘要： The present invention provides a continuous polymerization apparatus capable of simply and efficiently separating a polymer and solid matter from a reaction mixture while having an apparatus configuration conducive to washing and maintenance, and a continuous production method for a polymer. A continuous polymerization apparatus (100) includes a plurality of reaction vessels (1a to 1c), wherein the plurality of reaction vessels are configured such that reaction mixtures (9a to 9c) successively move through each reaction vessel; in the plurality of reaction vessels, gas phase parts formed above the reaction mixture communicate with one another; and the continuous polymerization apparatus includes a washing part (5), the washing part configured to separate a solid included in the reaction mixture by sedimentation and to perform countercurrent washing.
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公开(公告)号：US10731006B2
公开(公告)日：2020-08-04
申请号：US16099587
申请日：2018-02-05
申请人： Kureha Corporation
发明人： Kenji Suzuki , Michihisa Miyahara , Hiroshi Sakabe
IPC分类号： C08G75/0209 , C08G75/0259
摘要： The production method of the present invention includes: a supplying step of supplying reaction raw materials to at least one of a plurality of reaction vessels mutually communicated through a gas phase; a polymerizing step of carrying out a polymerization reaction; and a step of removing at least some of the water present in the reaction vessels. Each of the steps is carried out in parallel, and a reaction mixture is transferred sequentially between the reaction vessels. The total amount of water contained in the reaction raw materials in at least one of the reaction vessels to which the reaction raw materials are supplied is 3 moles or more per mole of the sulfur source, and the internal temperature of at least one of the reaction vessels to which the reaction raw materials are supplied is from 180° C. to 300° C.
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公开(公告)号：US10556992B2
公开(公告)日：2020-02-11
申请号：US16235900
申请日：2018-12-28
申请人： Kureha Corporation
IPC分类号： C08G75/0281 , B01D3/14 , C08G75/0204 , C08G75/0254 , B01D1/28 , C08J3/09
摘要： To provide a method of manufacturing polyarylene sulfide (PAS) while efficiently recovering an organic amide solvent at a low energy cost, without using an organic solvent, from washing wastewater produced by washing a raw material mixture containing PAS and an organic amide solvent using a solvent containing water; a method of manufacturing PAS by reducing the amount of water supplied when washing the raw material mixture using a solvent containing water; and PAS manufactured by these methods. A method according to the present invention includes: a step of mixing a solvent containing water and a raw material mixture that contains PAS and an organic amide solvent, and then washing the PAS; a step of obtaining a separated liquid by solid-liquid separation; and a step of separating the separated liquid into distilled vapor having a smaller amount of the organic amide solvent and a recovered liquid having a larger amount of the organic amide solvent by heating, where the heating is performed utilizing an increase in temperature based on compressing the distilled vapor and/or compressing a heat medium heat-exchanged with the distilled vapor.
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公开(公告)号：US10533072B2
公开(公告)日：2020-01-14
申请号：US16099538
申请日：2018-02-05
申请人： Kureha Corporation
发明人： Kenji Suzuki , Michihisa Miyahara , Hiroshi Sakabe
IPC分类号： C08G75/0209 , C08G75/0259
摘要： The production method of the present invention includes: a supplying step of supplying reaction raw materials to at least one of a plurality of reaction vessels that mutually communicate through a gas phase; a polymerizing step of carrying out a polymerization reaction; and a step of removing at least some of the water present in the reaction vessels. Each of the steps is carried out in parallel, and a reaction mixture is transferred sequentially between the reaction vessels. The amount of water contained in the reaction mixture in at least one of the reaction vessels is from 0.1 moles to less than 3 moles per mole of a sulfur source, and the total amount of water contained in the reaction raw materials that are supplied is 3 moles or more per mole of the sulfur source.
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公开(公告)号：US11453752B2
公开(公告)日：2022-09-27
申请号：US17597377
申请日：2020-03-19
申请人： Kureha Corporation
发明人： Kenji Suzuki , Hiroshi Sakabe , Michihisa Miyahara
IPC分类号： C08G75/025
摘要： A method of producing a PAS according to an embodiment of the present invention includes: a polymerizing step; a water removal step; a hydrogen sulfide recovering step in which hydrogen sulfide contained in a gas component produced in the water removal step is absorbed and recovered by an aqueous solution of an alkali metal hydroxide; and a condensation step in which the gas component produced in the water removal step is condensed. The hydrogen sulfide recovering step is performed before the condensation step.
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公开(公告)号：US10807062B2
公开(公告)日：2020-10-20
申请号：US16314496
申请日：2018-10-11
申请人： Kureha Corporation
发明人： Hiroshi Sakabe , Michihisa Miyahara , Kenji Suzuki
摘要： Provided is a continuous production apparatus and a continuous production method capable of preventing the countercurrent of evaporation components generated at the time of polymerization so that continuous solution polymerization reactions can progress reliably. A continuous production apparatus (100) includes a housing chamber (2) configured to house a plurality of reaction vessels (1a to 1d); wherein a reaction mixture is formed by subjecting monomers to a polymerization reaction in a solvent in at least one of the reaction vessels; the reaction vessels communicate with one another via a gas phase part (4); the reaction vessels are sequentially connected; the reaction mixture successively moves to each of the reaction vessels; and the housing chamber includes a baffle (9) configured to narrow the cross-sectional area of the gas phase part at the boundary between at least one pair of adjacent reaction vessels or in the vicinity of the boundary.
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7.发明授权公开(公告)号：US10703861B2
公开(公告)日：2020-07-07
申请号：US16099284
申请日：2018-02-05
申请人： Kureha Corporation
发明人： Michihisa Miyahara , Kenji Suzuki , Hiroshi Sakabe
IPC分类号： C08G75/0209 , C08G75/0259 , C08G75/0254
摘要： A method for producing polyarylene sulfide of the present invention includes the steps of: supplying reaction raw materials to at least one of a plurality of reaction vessels mutually communicated through a gas phase; carrying out a polymerization reaction; and removing at least some of the water present in the reaction vessels. Each of the steps is carried out in parallel, and a reaction mixture is transferred sequentially between the reaction vessels. At that time, the amount of heat that is removed in the polymerization reaction is less than the amount of reaction heat of the polymerization reaction.
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公开(公告)号：US10196487B2
公开(公告)日：2019-02-05
申请号：US15763243
申请日：2016-09-30
申请人： Kureha Corporation
发明人： Kenji Suzuki , Michihisa Miyahara , Hiroshi Sakabe
IPC分类号： C08G75/025 , C08G75/0259
摘要： The present invention is to provide a method of producing highly pure polyarylene sulfide (PAS) while the produced amount per unit volume is enhanced and side reactions are suppressed. The method of producing PAS according to an embodiment of the present invention, the method including: a preparation step of preparing a mixture containing an organic amide solvent, a sulfur source, water, a dihalo aromatic compound, and an alkali metal hydroxide in an amount that is less than an equimolar amount per 1 mol of the sulfur source; a first-stage polymerization of heating the mixture; an alkali addition step of adding the alkali metal hydroxide, in an amount that is not less than an equimolar amount per 1 mol of the sulfur source, into the mixture that has undergone the first-stage polymerization step; a concentration step of removing at least a part of the organic amide solvent and/or at least a part of the water in the mixture that has undergone the first-stage polymerization step; and a second-stage polymerization step of heating the mixture that has undergone the alkali addition step and the concentration step and continuing the polymerization reaction.
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公开(公告)号：US11203666B2
公开(公告)日：2021-12-21
申请号：US16314527
申请日：2018-10-11
申请人： Kureha Corporation
发明人： Kenji Suzuki , Michihisa Miyahara , Hiroshi Sakabe
IPC分类号： C08G75/14
摘要： Provided are a continuous production method and a continuous production apparatus utilizing the solution polycondensation for aromatic cyclic oligomers, which achieve a good space-time yield and are inexpensive and simple. The continuous production method includes: (a) supplying a polymerization solvent and a reaction raw material to a continuous production apparatus; (b) performing a polymerization reaction in the reaction vessels to form a reaction mixture; (c) removing water in gas phase parts of the reaction vessels from the reaction vessels; and (d) successively moving the reaction mixture to each of the reaction vessels; the steps (a), (b), (c), and (d) being performed in parallel; wherein an amount of the polymerization solvent in the reaction vessel positioned furthest downstream in a movement direction of the reaction mixture is not less than 1 L and not greater than 50 L per 1 mol of arylene units in the reaction raw material.
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公开(公告)号：US11203665B2
公开(公告)日：2021-12-21
申请号：US17000073
申请日：2020-08-21
申请人： Kureha Corporation
IPC分类号： C08G75/0209 , C08G75/0259
摘要： The production method of the present invention includes a step of supplying an organic polar solvent, a sulfur source, and a dihalo aromatic compound as reaction raw materials to at least one of a plurality of reaction vessels mutually communicated via a gas phase; a step of removing at least a portion of the water present in the reaction vessels; and a step of performing a polymerization reaction. These steps are carried out in parallel, and the reaction mixture is sequentially moved between reaction vessels. At that time, the internal temperatures of the reaction vessels are all not less than 150° C.
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